The question was, can you take a Beagle Board and stuff it in an N800 or 770 case, and the answer to that is no (the guy who built the prototype being discussed in this thread investigated that possibility). The Beagle Board specs are open, and there are already several clones, so it'd be relatively simple to build your own. This isn't the proposal at hand, though, and the idea is pretty pointless. By the time you put together a board that'll fit into an N800 case, you might as well just buy an RX-51.